How to combine 2 teradata queries into one - performance

Question

can someone please help me in combining these 2 Teradata queries into a single query? The tables - cdb.dim_party_doc_id, cdb.dim_doc_issuer, mdb.fp_account_entity_map do not have customer_account_number in them, so I not able to directly join all these tables in a single query directly.
Thanks a lot!!
SELECT
det.cust_id AS customer_account_number,
c.encrypt_val AS ssn_encrypted,
det.cust_first_name AS name_1,
bal.BALANCE_AMT AS principal
FROM
cdb.DIM_CUSTOMER det
INNER JOIN
cdb.fact_stored_val_acct_dly bal
ON det.cust_id = bal.customer_id AND bal.curr_cd='USD' and bal.acct_type_code='SBA'
INNER JOIN
cdb.dim_party_acct_map b
ON bal.customer_id = b.cust_id
INNER JOIN
cdb.dim_party_doc_id c
ON b.party_key = c.party_key
AND c.status = 'A'
INNER JOIN
cdb.dim_doc_issuer d
ON c.doc_issuer_id = d.doc_issuer_id
AND d.doc_type = 'TAX_ID'
AND d.doc_subtype = 'SSN'
and
SELECT
own.owner_id AS customer_account_number,
entity.entity_id AS dd_number
FROM
mdb.fp_account_owner_map own
LEFT JOIN
mdb.fp_account_entity_map entity
ON own.fp_account_id = entity.fp_account_id
WHERE
entity.entity_type in (12)
AND
own.product_id in (5501)

Answer 1

Below query solves my problem
SELECT
det.cust_id AS customer_account_number,
temp.direct_deposit_account_number AS account_number,
c.encrypt_val AS ssn_encrypted,
det.cust_first_name AS name_1,
bal.BALANCE_AMT AS principal
FROM
cdb.DIM_CUSTOMER det
LEFT JOIN
cdb.fact_stored_val_acct_dly bal
ON det.cust_id = bal.customer_id AND bal.curr_cd='USD' and bal.acct_type_code='SBA'
INNER JOIN
cdb.dim_party_acct_map b
ON bal.customer_id = b.cust_id
INNER JOIN
cdb.dim_party_doc_id c
ON b.party_key = c.party_key
AND c.status = 'A'
INNER JOIN
cdb.dim_doc_issuer d
ON c.doc_issuer_id = d.doc_issuer_id
AND d.doc_type = 'TAX_ID'
AND d.doc_subtype = 'SSN'
INNER JOIN
(SELECT
own.owner_id AS customer_id,
entity.entity_id AS direct_deposit_account_number
FROM mdb.fp_account_owner_map own
LEFT JOIN
mdb.fp_account_entity_map entity
ON own.fp_account_id = entity.fp_account_id
WHERE entity.entity_type in (12)
AND own.product_id in (5501)) AS temp
ON customer_account_number=temp.customer_id